Automatic firearm



FIG. 1 is a side elevational view of an automatic firearm showing my new design;

FIG. 2 is an elevational view from the side opposite to FIG. 1;

FIG. 3 is a top plan view;

FIG. 4 is a bottom plan view;

FIG. 5 is a front elevational view; and

FIG. 6 is a rear elevational view. 

The ornamental design for an automatic firearm, as shown. 